Ubuntu :: Write A Bash Script Which Will Find Files Then Move Them To A Specific Directory?

I'm trying to write a bash script which will find files then move them to a specific directory.

So far I have:

Code:
#!/bin/bash
#script to find and move files
src_dir="/path/to/source/directory"
des_dir_mov="/path/to/destination/directory/for/movies"
des_dir_img="/path/to/destination/directory/for/images"
find $src_dir -iname '*.avi' -type f -exec mv '{}' $des_dir_mov ';'

I'd like to have all the possible movie file types then the image file types checked in a loop.

Every time I try to include an array in this script it breaks